Anser, anseris=a Goose.
Bill at base nearly as high as head. Cutting edges of bill distinctly arched, with indentations of upper mandible visible (except in A. indicus). Of large size and grey plumage. Legs usually reddish. Tail short, rounded, of sixteen or eighteen feathers. Nest of grass on the ground, lined with down. Six to twelve eggs, yellowish white.
Tip of upper mandible white.